X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=net%2Fsctp%2Fulpevent.c;h=8b3560fd876d2b95b361460b16fa3d92291a3160;hb=d20ef63d32461332958661df73e21c0ca42601b0;hp=445e07a7ac4b873cd1f7138e806fd97c1d1a0193;hpb=0f3fffd8ab1db7658c97c167e8ab001cc814e1f4;p=safe%2Fjmp%2Flinux-2.6

diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c
index 445e07a..8b3560f 100644
--- a/net/sctp/ulpevent.c
+++ b/net/sctp/ulpevent.c
@@ -1,4 +1,4 @@
-/* SCTP kernel reference Implementation
+/* SCTP kernel implementation
  * (C) Copyright IBM Corp. 2001, 2004
  * Copyright (c) 1999-2000 Cisco, Inc.
  * Copyright (c) 1999-2001 Motorola, Inc.
@@ -8,13 +8,14 @@
  *
  * These functions manipulate an sctp event.   The struct ulpevent is used
  * to carry notifications and data to the ULP (sockets).
- * The SCTP reference implementation is free software;
+ *
+ * This SCTP implementation is free software;
  * you can redistribute it and/or modify it under the terms of
  * the GNU General Public License as published by
  * the Free Software Foundation; either version 2, or (at your option)
  * any later version.
  *
- * The SCTP reference implementation is distributed in the hope that it
+ * This SCTP implementation is distributed in the hope that it
  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  *                 ************************
  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
@@ -131,19 +132,47 @@ static inline void sctp_ulpevent_release_owner(struct sctp_ulpevent *event)
 struct sctp_ulpevent  *sctp_ulpevent_make_assoc_change(
 	const struct sctp_association *asoc,
 	__u16 flags, __u16 state, __u16 error, __u16 outbound,
-	__u16 inbound, gfp_t gfp)
+	__u16 inbound, struct sctp_chunk *chunk, gfp_t gfp)
 {
 	struct sctp_ulpevent *event;
 	struct sctp_assoc_change *sac;
 	struct sk_buff *skb;
 
-	event = sctp_ulpevent_new(sizeof(struct sctp_assoc_change),
+	/* If the lower layer passed in the chunk, it will be
+	 * an ABORT, so we need to include it in the sac_info.
+	 */
+	if (chunk) {
+		/* Copy the chunk data to a new skb and reserve enough
+		 * head room to use as notification.
+		 */
+		skb = skb_copy_expand(chunk->skb,
+				      sizeof(struct sctp_assoc_change), 0, gfp);
+
+		if (!skb)
+			goto fail;
+
+		/* Embed the event fields inside the cloned skb.  */
+		event = sctp_skb2event(skb);
+		sctp_ulpevent_init(event, MSG_NOTIFICATION, skb->truesize);
+
+		/* Include the notification structure */
+		sac = (struct sctp_assoc_change *)
+			skb_push(skb, sizeof(struct sctp_assoc_change));
+
+		/* Trim the buffer to the right length.  */
+		skb_trim(skb, sizeof(struct sctp_assoc_change) +
+			 ntohs(chunk->chunk_hdr->length) -
+			 sizeof(sctp_chunkhdr_t));
+	} else {
+		event = sctp_ulpevent_new(sizeof(struct sctp_assoc_change),
 				  MSG_NOTIFICATION, gfp);
-	if (!event)
-		goto fail;
-	skb = sctp_event2skb(event);
-	sac = (struct sctp_assoc_change *)
-		skb_put(skb, sizeof(struct sctp_assoc_change));
+		if (!event)
+			goto fail;
+
+		skb = sctp_event2skb(event);
+		sac = (struct sctp_assoc_change *) skb_put(skb,
+					sizeof(struct sctp_assoc_change));
+	}
 
 	/* Socket Extensions for SCTP
 	 * 5.3.1.1 SCTP_ASSOC_CHANGE
@@ -177,7 +206,7 @@ struct sctp_ulpevent  *sctp_ulpevent_make_assoc_change(
 	 * This field is the total length of the notification data, including
 	 * the notification header.
 	 */
-	sac->sac_length = sizeof(struct sctp_assoc_change);
+	sac->sac_length = skb->len;
 
 	/* Socket Extensions for SCTP
 	 * 5.3.1.1 SCTP_ASSOC_CHANGE
@@ -657,12 +686,37 @@ struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc,
 	struct sctp_ulpevent *event = NULL;
 	struct sk_buff *skb;
 	size_t padding, len;
+	int rx_count;
+
+	/*
+	 * check to see if we need to make space for this
+	 * new skb, expand the rcvbuffer if needed, or drop
+	 * the frame
+	 */
+	if (asoc->ep->rcvbuf_policy)
+		rx_count = atomic_read(&asoc->rmem_alloc);
+	else
+		rx_count = atomic_read(&asoc->base.sk->sk_rmem_alloc);
+
+	if (rx_count >= asoc->base.sk->sk_rcvbuf) {
+
+		if ((asoc->base.sk->sk_userlocks & SOCK_RCVBUF_LOCK) ||
+		    (!sk_rmem_schedule(asoc->base.sk, chunk->skb->truesize)))
+			goto fail;
+	}
 
 	/* Clone the original skb, sharing the data.  */
 	skb = skb_clone(chunk->skb, gfp);
 	if (!skb)
 		goto fail;
 
+	/* Now that all memory allocations for this chunk succeeded, we
+	 * can mark it as received so the tsn_map is updated correctly.
+	 */
+	if (sctp_tsnmap_mark(&asoc->peer.tsn_map,
+			     ntohl(chunk->subh.data_hdr->tsn)))
+		goto fail_mark;
+
 	/* First calculate the padding, so we don't inadvertently
 	 * pass up the wrong length to the user.
 	 *
@@ -703,8 +757,12 @@ struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc,
 	event->msg_flags |= chunk->chunk_hdr->flags;
 	event->iif = sctp_chunk_iif(chunk);
 
-fail:
 	return event;
+
+fail_mark:
+	kfree_skb(skb);
+fail:
+	return NULL;
 }
 
 /* Create a partial delivery related event.
@@ -749,7 +807,7 @@ struct sctp_ulpevent *sctp_ulpevent_make_pdapi(
 	 */
 	pd->pdapi_length = sizeof(struct sctp_pdapi_event);
 
-        /*  pdapi_indication: 32 bits (unsigned integer)
+	/*  pdapi_indication: 32 bits (unsigned integer)
 	 *
 	 * This field holds the indication being sent to the application.
 	 */
@@ -767,6 +825,43 @@ fail:
 	return NULL;
 }
 
+struct sctp_ulpevent *sctp_ulpevent_make_authkey(
+	const struct sctp_association *asoc, __u16 key_id,
+	__u32 indication, gfp_t gfp)
+{
+	struct sctp_ulpevent *event;
+	struct sctp_authkey_event *ak;
+	struct sk_buff *skb;
+
+	event = sctp_ulpevent_new(sizeof(struct sctp_authkey_event),
+				  MSG_NOTIFICATION, gfp);
+	if (!event)
+		goto fail;
+
+	skb = sctp_event2skb(event);
+	ak = (struct sctp_authkey_event *)
+		skb_put(skb, sizeof(struct sctp_authkey_event));
+
+	ak->auth_type = SCTP_AUTHENTICATION_INDICATION;
+	ak->auth_flags = 0;
+	ak->auth_length = sizeof(struct sctp_authkey_event);
+
+	ak->auth_keynumber = key_id;
+	ak->auth_altkeynumber = 0;
+	ak->auth_indication = indication;
+
+	/*
+	 * The association id field, holds the identifier for the association.
+	 */
+	sctp_ulpevent_set_owner(event, asoc);
+	ak->auth_assoc_id = sctp_assoc2id(asoc);
+
+	return event;
+fail:
+	return NULL;
+}
+
+
 /* Return the notification type, assuming this is a notification
  * event.
  */
@@ -775,7 +870,7 @@ __u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event)
 	union sctp_notification *notification;
 	struct sk_buff *skb;
 
-	skb = sctp_event2skb((struct sctp_ulpevent *)event);
+	skb = sctp_event2skb(event);
 	notification = (union sctp_notification *) skb->data;
 	return notification->sn_header.sn_type;
 }
@@ -790,13 +885,13 @@ void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
 		return;
 
 	/* Sockets API Extensions for SCTP
- 	 * Section 5.2.2 SCTP Header Information Structure (SCTP_SNDRCV)
- 	 *
- 	 * sinfo_stream: 16 bits (unsigned integer)
- 	 *
- 	 * For recvmsg() the SCTP stack places the message's stream number in
- 	 * this value.
- 	*/
+	 * Section 5.2.2 SCTP Header Information Structure (SCTP_SNDRCV)
+	 *
+	 * sinfo_stream: 16 bits (unsigned integer)
+	 *
+	 * For recvmsg() the SCTP stack places the message's stream number in
+	 * this value.
+	*/
 	sinfo.sinfo_stream = event->stream;
 	/* sinfo_ssn: 16 bits (unsigned integer)
 	 *
@@ -828,7 +923,7 @@ void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
 	sinfo.sinfo_flags = event->flags;
 	/* sinfo_tsn: 32 bit (unsigned integer)
 	 *
-	 * For the receiving side, this field holds a TSN that was 
+	 * For the receiving side, this field holds a TSN that was
 	 * assigned to one of the SCTP Data Chunks.
 	 */
 	sinfo.sinfo_tsn = event->tsn;
@@ -879,16 +974,15 @@ static void sctp_ulpevent_receive_data(struct sctp_ulpevent *event,
 	 * fragment of the real event.  However, we still need to do rwnd
 	 * accounting.
 	 * In general, the skb passed from IP can have only 1 level of
-	 * fragments. But we allow multiple levels of fragments. 
+	 * fragments. But we allow multiple levels of fragments.
 	 */
-	for (frag = skb_shinfo(skb)->frag_list; frag; frag = frag->next) {
+	skb_walk_frags(skb, frag)
 		sctp_ulpevent_receive_data(sctp_skb2event(frag), asoc);
-	}
 }
 
 /* Do accounting for bytes just read by user and release the references to
  * the association.
- */ 
+ */
 static void sctp_ulpevent_release_data(struct sctp_ulpevent *event)
 {
 	struct sk_buff *skb, *frag;
@@ -908,7 +1002,7 @@ static void sctp_ulpevent_release_data(struct sctp_ulpevent *event)
 		goto done;
 
 	/* Don't forget the fragments. */
-	for (frag = skb_shinfo(skb)->frag_list; frag; frag = frag->next) {
+	skb_walk_frags(skb, frag) {
 		/* NOTE:  skb_shinfos are recursive. Although IP returns
 		 * skb's with only 1 level of fragments, SCTP reassembly can
 		 * increase the levels.
@@ -931,7 +1025,7 @@ static void sctp_ulpevent_release_frag_data(struct sctp_ulpevent *event)
 		goto done;
 
 	/* Don't forget the fragments. */
-	for (frag = skb_shinfo(skb)->frag_list; frag; frag = frag->next) {
+	skb_walk_frags(skb, frag) {
 		/* NOTE:  skb_shinfos are recursive. Although IP returns
 		 * skb's with only 1 level of fragments, SCTP reassembly can
 		 * increase the levels.